Eddycurrent thanks for your answer
As i said the plans are not accurate and mostly i want an opinion about the 120X60 box tubes arrangement
If it is ok i will go on with the triangulation support that will attach the C shape gantry to the carriages
To be honest i was thinking something like what you design but a little bit more complex. As what i have in mind will be influenced from the gantry shape, that is why i didn’t design the left and right parts of the gantry
Thank again
Vagelis